\begin{table}[tbp] \centering
\newcolumntype{C}{>{\centering\arraybackslash}X}

\begin{tabularx}{\linewidth}{lCCCCCCCC}

\toprule
{Bandwidth}&{Warbonds}&{Volunteers}&{Medals}&{PCA}&{Warbonds}&{Volunteers}&{Medals}&{PCA} \tabularnewline
\midrule \addlinespace[\belowrulesep]
200 km&0.0000&0.0000&0.0013&0.0000&0.0000&0.0000&0.0000&0.0000 \tabularnewline
400 km&0.1474&0.0000&0.9822&0.0000&0.9674&0.0000&0.9844&0.0019 \tabularnewline
600 km&0.9286&0.9592&0.9987&0.0465&0.9986&1.0000&0.9997&0.9997 \tabularnewline
800 km&0.9146&0.9998&0.9582&0.7056&0.9975&0.9998&0.9934&0.9969 \tabularnewline
1000 km&0.9358&0.4708&0.9994&0.9649&0.9722&0.8718&1.0000&0.9975 \tabularnewline
\bottomrule 

\end{tabularx}
\end{table}
